docstr: The 'marker' property is an instance of Marker
  that may be specified as:
    - An instance of :class:`plotly.graph_objs.bar.selected.Marker`
    - A dict of string/value properties that will be passed
      to the Marker constructor
  
      Supported dict properties:
  
          color
              Sets the marker color of selected points.
          opacity
              Sets the marker opacity of selected points.
  
  Returns
  -------
  plotly.graph_objs.bar.selected.Marker
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code: def marker(self):
      """
      The 'marker' property is an instance of Marker
      that may be specified as:
        - An instance of :class:`plotly.graph_objs.bar.selected.Marker`
        - A dict of string/value properties that will be passed
          to the Marker constructor
  
          Supported dict properties:
  
              color
                  Sets the marker color of selected points.
              opacity
                  Sets the marker opacity of selected points.
  
      Returns
      -------
      plotly.graph_objs.bar.selected.Marker
      """
      return self["marker"]
  
file_path: plotly.py/packages/python/plotly/plotly/graph_objs/bar/_selected.py
imports: from plotly.basedatatypes import BaseTraceHierarchyType
  import copy
label_desc: Use image node_id 1 for calling the Selected obj's underlying member method code with example usage: obj.marker() and returns: self